FYI: The only way to install the 2.70" Pulley is to have the Jackshaft Housing machined down for it to fit properly. Some Jackshaft Housing Castings are made differently in sizes and do vary, as to what the smallest pulley you can use without maching. The smallest size recommended is 2.80", without any machining performed on the jackshaft housing casting area

*** Remember - Above Boost Increases are Fully Dependant Upon proper Tuning and Modifications, to prevent any and all Knock Retard associated with using Smaller Supercharger Pulleys or Pulley Units!

__________________

I just inherited 12,000,000 Euros from the prince of spain, and I have the "@yahoo.com" email to prove it !

Actually that's not exactly accurate information...,
At lower boost levels the gain is 1lb of boost per .2 of an inch dropped off the pulley size. At higher levels it does get closer to 1lb gained per .1....

Actually that's not exactly accurate information...,
At lower boost levels the gain is 1lb of boost per .2 of an inch dropped off the pulley size. At higher levels it does get closer to 1lb gained per .1....

Sent from my amazing and awesome iPhone4

Correct.
I assume not one customer is going to order a pulley, going off of the 1lb per 0.2 of an inch calculations at low boost though. When ordering pulleys we usually use the WOT boost & The 1lb per 0.1 rule as it is pretty much a standard... The information is based upon WOT... Hence the info and the pulley sizes that someone would want to use when ordering.

The stock boost for any Magnacharger TVS 2300 Supercharger Kit installed upon any 2010 / 2011 Camaro 6.2L V8 with a 3.80" Magnacharger Pulley installed on it is only 6 psi at wide open throttle.

Thanks...

Josh

__________________

I just inherited 12,000,000 Euros from the prince of spain, and I have the "@yahoo.com" email to prove it !

FYI: The only way to install the 2.70" Pulley is to have the Jackshaft Housing machined down for it to fit properly. Some Jackshaft Housing Castings are made differently in sizes and do vary, as to what the smallest pulley you can use without maching. The smallest size recommended is 2.80", without any machining performed on the jackshaft housing casting area

*** Remember - Above Boost Increases are Fully Dependant Upon proper Tuning and Modifications, to prevent any and all Knock Retard associated with using Smaller Supercharger Pulleys or Pulley Units!

I think you meant to say choose a pulley .2 (two-tenths) diameter smaller, not two sizes smaller.

Generally pulley sizes are referred to as .1 being each size...except in the case of the 3.5 since we don't make that one. I know I have read this exact information somewhere else... either pulleyboys or ebay. But I don't recall where

But I also don't think anyone actually sees a 2lb boost drop with headers...MAYBE a cam & headers.

Generally pulley sizes are referred to as .1 being each size...except in the case of the 3.5 since we don't make that one. I know I have read this exact information somewhere else... either pulleyboys or ebay. But I don't recall where

But I also don't think anyone actually sees a 2lb boost drop with headers...MAYBE a cam & headers.

I can't answer that first hand as I don't run a guage as I didn't see it necessary for 4 to 5 PSI of boost. I wouldn't be suprized to see guys like myself running 1 7/8" long tubes into 3 inchers loosing up to two pounds though as WOT.

Generally pulley sizes are referred to as .1 being each size...except in the case of the 3.5 since we don't make that one. I know I have read this exact information somewhere else... either pulleyboys or ebay. But I don't recall where

But I also don't think anyone actually sees a 2lb boost drop with headers...MAYBE a cam & headers.

On the TVS 1900 you have the .1 size pulley size changes but on the more popular TVS 2300's the pulley sizes are .2 changes until you get below a 3.2 whereas I don't think 99% of the magie owners ever use a pulley smaller than 3.2.

On the TVS 1900 you have the .1 size pulley size changes but on the more popular TVS 2300's the pulley sizes are .2 changes until you get below a 3.2 whereas I don't think 99% of the magie owners ever use a pulley smaller than 3.2.

With a 8 rib 3.0 and the 1:1 cog drive on the rear to elimiante any slippage, we made 14 psi. So we are changing to the OD rear cog and maybe back to the 3.2 to make around 16 psi.

Generally, at least on my car, any pulley change we make results in a 2lb change in the boost. The 3.4 made 10.5, the 3.2 made 12.5 and the 3.0 made just over 14.